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Exercise 44 Choose the appropriate words in brackets.
1. Most of the power required is (obtained, obtain, obtaining) mainly from two sources 2. Electric locomotives are (external, externally) supplied with electric power. 3. The modern diesel-electric locomotive is an (electric, electrical, electrically) propelled unit. 4. The environmental consequences are (potential, potentially, potent) catastrophic.
Exercise 45 Find antonyms among the following words.
Advantage, ability, disadvantage, light, powerful, external, low, to lose, heavy, disability, powerless, to find, internal, high, cold, to cool, to heat, warm.
Exercise 46 Match the words and their definition
| 1. fossil fuel 2. energy 3. population 4. to heat 5. a train 6. current 7. a motor 8. a wheel 9. fluid 10. environment 11. renewable | a) capacity for performing work b) capable of being renewed c) a flow of electric charge d) the circumstances and objects by which one is surrounded e) the whole number of people in a country f) a small compact engine g) a liquid or gas tending to flow h) a circular metal frame that is capable of turning on an axle i) coal, oil, or natural gas formed in the earth from plant or animal remains j) a line of railroad cars with or without a locomotive k) to make warm or hot |
Exercise 47 Read the text and give the main idea of every passage.
Supplementary Text
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